[PATCH 5.10 657/717] spi: st-ssc4: Fix unbalanced pm_runtime_disable() in probe error path

Greg Kroah-Hartman
2020-12-28T14:35:48Z

From: Lukas Wunner <lukas@wunner.de>

commit 5ef76dac0f2c26aeae4ee79eb830280f16d5aceb upstream.

If the calls to devm_platform_ioremap_resource(), irq_of_parse_and_map()
or devm_request_irq() fail on probe of the ST SSC4 SPI driver, the
runtime PM disable depth is incremented even though it was not
decremented before. Fix it.

Fixes: cd050abeba2a ("spi: st-ssc4: add missed pm_runtime_disable")
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Cc: <stable@vger.kernel.org> # v5.5+
Cc: Chuhong Yuan <hslester96@gmail.com>
Link: https://lore.kernel.org/r/fbe8768c30dc829e2d77eabe7be062ca22f84024.1604874488.git.lukas@wunner.de
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/spi/spi-st-ssc4.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/spi/spi-st-ssc4.c
+++ b/drivers/spi/spi-st-ssc4.c
@@ -375,13 +375,14 @@ static int spi_st_probe(struct platform_
ret = devm_spi_register_master(&pdev->dev, master);
if (ret) {
dev_err(&pdev->dev, "Failed to register master\n");
- goto clk_disable;
+ goto rpm_disable;
}

return 0;

-clk_disable:
+rpm_disable:
pm_runtime_disable(&pdev->dev);
+clk_disable:
clk_disable_unprepare(spi_st->clk);
put_master:
spi_master_put(master);